6505646624 has 12 divisors (see below), whose sum is σ = 12807991854. Its totient is φ = 3252823296.

The previous prime is 6505646599. The next prime is 6505646629. The reversal of 6505646624 is 4266465056.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4290250000 + 2215396624 = 65500^2 + 47068^2 .

It is not an unprimeable number, because it can be changed into a prime (6505646629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101650697 + ... + 101650760.

Almost surely, 2^6505646624 is an apocalyptic number.

It is an amenable number.

6505646624 is a deficient number, since it is larger than the sum of its proper divisors (6302345230).

6505646624 is a wasteful number, since it uses less digits than its factorization.

6505646624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203301467 (or 203301459 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The square root of 6505646624 is about 80657.5887564214. The cubic root of 6505646624 is about 1866.7958344858.

The spelling of 6505646624 in words is "six billion, five hundred five million, six hundred forty-six thousand, six hundred twenty-four".